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Sol-Gel Derived Eu3+-Doped Gd2Ti2O7 Pyrochlore Nanopowders
dc.creator | Ćulubrk, Sanja | |
dc.creator | Antić, Željka | |
dc.creator | Lojpur, Vesna | |
dc.creator | Marinović-Cincović, Milena | |
dc.creator | Dramićanin, Miroslav | |
dc.date.accessioned | 2018-03-01T16:00:32Z | |
dc.date.available | 2018-03-01T16:00:32Z | |
dc.date.issued | 2015 | |
dc.identifier.issn | 1687-4110 | |
dc.identifier.issn | 1687-4129 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/460 | |
dc.description.abstract | Herein we presented hydrolytic sol-gel synthesis and photoluminescent properties of Eu3+-doped Gd2Ti2O7 pyrochlore nanopowders. According to Gd2Ti2O7 precursor gel thermal analysis a temperature of 840 degrees C is identified for the formation of the crystalline pyrochlore phase. Obtained samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopy, and photoluminescence spectroscopy. The powders consist of well-crystalline cubic nanocrystallites of approximately 20 nm in size as evidenced from X-ray diffraction. The scanning and transmission electron microscopy shows that investigated Eu3+-doped Gd2Ti2O7 nanopowders consist of compact, dense aggregates composed entirely of nanoparticles with variable both shape and dimension. The influence of Eu3+ ions concentration on the optical properties, namely, photoluminescence emission and decay time, is measured and discussed. Emission intensity as a function of Eu3+ ions concentration shows that Gd2Ti2O7 host can accept Eu3+ ions in concentrations up to 10 at.%. On the other hand, lifetime values are similar up to 3 at.%(similar to 2.7ms) and experience decrease at higher concentrations (2.4ms for 10 at.% Eu3+). Moreover, photoluminescent spectra and lifetime values clearly revealed presence of structural defects in sol-gel derived materials proposing photoluminescent spectroscopy as a sensitive tool for monitoring structural changes in both steady state and lifetime domains. | en |
dc.relation | info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45020/RS// | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172056/RS// | |
dc.rights | openAccess | en |
dc.source | Journal of Nanomaterials | en |
dc.title | Sol-Gel Derived Eu3+-Doped Gd2Ti2O7 Pyrochlore Nanopowders | en |
dc.type | article | en |
dcterms.abstract | Мариновић-Цинцовић Милена; Драмићанин Мирослав; Лојпур Весна; Aнтиц, Зељка; Цулубрк, Сања; | |
dc.identifier.wos | 000351410400001 | |
dc.identifier.doi | 10.1155/2015/514173 | |
dc.citation.other | Article Number: 514173 | |
dc.citation.rank | M22 | |
dc.type.version | publishedVersion | |
dc.identifier.scopus | 2-s2.0-84925326265 | |
dc.identifier.fulltext | https://vinar.vin.bg.ac.rs//bitstream/id/12897/456.pdf |